<script lang="ts" setup name="TopCategory">
import useStore from '@/store';
import { useRoute } from 'vue-router'
// import { watch, } from 'vue'
import { watchEffect } from 'vue'
import { storeToRefs } from 'pinia';
import GoodsItem from './components/goods-item.vue'

const { category, home } = useStore()
const route = useRoute()

const { topCategory } = storeToRefs(category)

// 由于路由切换，组件没有换，还是同一个分类组件，只是根据不同的id渲染不同的分类
// setup只会执行一次，就应该监听路由的变化，路由只要变了，就应该发送请求

// watch想要监听谁就监听谁
// watch(
//   () => route.params.id,
//   (newVal) => {
//     if (!newVal) return
//     category.getTopCategory(route.params.id as string)
//   },
//   { immediate: true }
// )

// watchEffect用到了什么数据就会自动监视什么数据，且一进入页面就会触发一次
watchEffect(() => {
  // 有参数才发请求，没有参数直接return
  if (!route.params.id) return
  // 这个请求只在一级类目去发
  if (route.fullPath !== `/category/${route.params.id}`) return
  // 获取一级分类的数据（渲染面包屑等）
  category.getTopCategory(route.params.id as string)
  // 获取展示的轮播图数据
  home.getBannerList()
})

</script>
<template>
  <div class="top-category">
    <div class="container">
      <XtxBread>
        <XtxBreadItem to="/">首页</XtxBreadItem>
        <XtxBreadItem>{{ category.topCategory.name }}</XtxBreadItem>
      </XtxBread>
      <XtxCarousel :slides="home.bannerList" autoplay style="height: 500px;"></XtxCarousel>
      <!-- 所有二级分类 -->
      <div class="sub-list">
        <h3>全部分类</h3>
        <ul>
          <li v-for="item in topCategory.children" :key="item.id">
            <a href="javascript:;">
              <img v-lazy="item.picture">
              <p>{{ item.name }}</p>
            </a>
          </li>
        </ul>
      </div>
      <!-- 分类关联商品 -->
      <div class="ref-goods" v-for="item in topCategory.children" :key="item.id">
        <div class="head">
          <h3>- {{ item.name }} -</h3>
          <p class="tag">温暖柔软，品质之选</p>
          <XtxMore />
        </div>
        <div class="body">
          <GoodsItem :goods="obj" v-for="obj in item.goods" :key="obj.id" />
        </div>
      </div>
    </div>

  </div>
</template>
<style scoped lang="less">
.top-category {
  h3 {
    font-size: 28px;
    color: #666;
    font-weight: normal;
    text-align: center;
    line-height: 100px;
  }

  .sub-list {
    margin-top: 20px;
    background-color: #fff;

    ul {
      display: flex;
      padding: 0 32px;
      flex-wrap: wrap;

      li {
        width: 168px;
        height: 160px;

        a {
          text-align: center;
          display: block;
          font-size: 16px;

          img {
            width: 100px;
            height: 100px;
          }

          p {
            line-height: 40px;
          }

          &:hover {
            color: @xtxColor;
          }
        }
      }
    }
  }

  .ref-goods {
    background-color: #fff;
    margin-top: 20px;
    position: relative;

    .head {
      .xtx-more {
        position: absolute;
        top: 20px;
        right: 20px;
      }

      .tag {
        text-align: center;
        color: #999;
        font-size: 20px;
        position: relative;
        top: -20px;
      }
    }

    .body {
      display: flex;
      justify-content: flex-start;
      flex-wrap: wrap;
      padding: 0 65px 30px;
    }
  }
}
</style>